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Ni3Al(Zr)合金的高温环境脆性
Alternative TitleEnvironmental Embrittlement of Ni3Al(Zr) Alloy at High Temperatures
李玉芳; 郭建亭
2008
Source Publication南京航空航天大学学报
ISSN1005-2615
Volume40.0Issue:003Pages:380-384
AbstractNi3Al(Zr)合金在700-1050℃之间存在低塑性区,无论在空气还是在真空中,都表现出脆性的沿晶断裂,塑性很低。在拉伸过程中形成的致密氧化铝薄膜能够有效地阻止氧向基体中扩散,减少环境脆性,提高合金的高温塑性。活性元素Zr能够与氧原子相互作用,减少裂纹沿晶界扩展,改善合金的高温塑性。
Other AbstractThe tensile ductility of the Ni3Al(Zr) alloy is sensitive to temperature and exists low ductility from 700 to 1050℃ both in air and 10^-3 Pa vacuum. The fracture mode becomes intergrangular. The formation of oxide layer during tensile process at elevated temperature in air suppresses environmental embrittlement for the alloy. It is found that Al-rich oxide film is more effective in protecting the underlying alloy from oxygen penetration. Zr element presented in appropriate quantity can increase the ductility at intermediate temperature by their interaction with diffusing oxygen atoms.
KeywordNi3Al(Zr) 力学性能 断裂 环境脆性
Indexed ByCSCD
Language中文
CSCD IDCSCD:3322381
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/153750
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
李玉芳,郭建亭. Ni3Al(Zr)合金的高温环境脆性[J]. 南京航空航天大学学报,2008,40.0(003):380-384.
APA 李玉芳,&郭建亭.(2008).Ni3Al(Zr)合金的高温环境脆性.南京航空航天大学学报,40.0(003),380-384.
MLA 李玉芳,et al."Ni3Al(Zr)合金的高温环境脆性".南京航空航天大学学报 40.0.003(2008):380-384.
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